Study On Monitoring And Identification Of Major Hidden Hazards And Safety Evaluation Method Of Mine Ventilation System

The mine ventilation system is an integral part of the mine production management system,and it is also the key to preventing gas,mine dust and fire accidents.At present,the identification of major hidden dangers of the ventilation system is only in the stage of manual intervention.There are few researches on intelligent monitoring and identification,and it is difficult to realize real-time monitoring and identification of the ventilation system,and it is difficult to realize the real-time monitoring and identification of the ventilation system.Most of the work of ventilation system safety risk assessment also requires expert decision,and it is difficult to carry out real-time quantitative evaluation based on various monitoring data in the ventilation system.In order to better realize the real-time quantitative evaluation of the safety status of the mine ventilation system and accurately identify the major hidden dangers in the system,this article takes the ventilation system of a mine in Shanxi as the research object,analyzes the influencing factors of two major safety hazards,insufficient air volume and instability of the ventilation system,and gives quantitative identification indicators and models.The analytic hierarchy process based on the neutral reference object is proposed.The indicators and models for the safety risk monitoring and evaluation of the mine ventilation system are constructed to realize the correct and reasonable evaluation of the ventilation system.The primary researches are as follows:(1)The current monitoring air volume,the simple moving average of the air volume within 5 minutes and the moving average of the air volume index within one month are used as the identification indicators for the insufficient air volume.The insufficient air volume recognition model is established,and the hidden dangers of the insufficient air volume in the mine are identified according to the given score value.Using the average true range as the identification index of the ventilation system's instability,the ventilation system's instability identification model is constructed,and the stability of the ventilation system is judged according to the final score value.(2)Thirteen representative and quantifiable evaluation indicators affecting the safety of mine ventilation system are selected from four aspects of ventilation system stability,air volume rationality,air flow quality and ventilation difficulty,and establish a set of safety risk monitoring and evaluation models that can evaluate the mine ventilation system in real time.According to the pre-set evaluation index scoring rules,the analytic hierarchy process based on neutral reference objects gives the weight value and scoring value of each evaluation index.The evaluation results are obtained by comparing them with the set neutral reference value.(3)Conducted major hidden danger monitoring and identification and safety risk monitoring and evaluation on the ventilation system of the test mine.The results show that the test mine ventilation system has no major hidden dangers of insufficient air volume or the ventilation system's instability during the monitoring period.The safety of the mine ventilation system is good,which is basically consistent with the actual situation of the current mine.It is further verified that the hidden danger monitoring and identification model and the safety risk monitoring and evaluation model are reasonable and feasible,which has practical guiding significance for the safety production of ventilation system.